Value entered greater than value still to be invoiced

What causes this issue?

For the <GL:delivery_costs>delivery costs</>, you have entered a larger
amount than the amount to be invoiced.

How to fix this error?

Check your input and correct it if necessary. You may have to choose
"Cancel" and call up the function ""Select delivery costs" again to
obtain the correct default values.

Error message extract from SAP system. Copyright SAP SE.